| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a hot water storage and supply device having a structure capable of avoiding high-temperature hot-water tapping without any additionally provided expensive component.SOLUTION: A hot water storage and supply device 1 comprises: a hot water storage tank 2; a water supply passage 5; a hot water delivery passage 6; a bypass passage 15; blending means 13 for regulating the flow rate of hot water of the hot water delivery passage 6 and the flow rate of water of the bypass passage 15 so as to blend them; an auxiliary heat source machine 3 disposed at the hot water delivery passage 6; a heat utilization circulation circuit 9 branched from a passage part between the downstream side of the auxiliary heat source machine 3 of the hot water delivery passage 6 and the upstream side of the blending means 13 while being connected to a passage part on the upstream side of the auxiliary heat source machine 3 of the hot water delivery passage 6, the heat utilization circulation circuit 9 including a part of the hot water delivery passage 6; a circulation pump 28 disposed at the heat utilization circulation circuit 9; a connection passage 30 branched from the water supply passage 5 and connected to the heat utilization circulation circuit 9; and a control unit 10 for driving the circulation pump 28 such that during the hot water supply operation, water is not fed from the connection passage 30 to the heat utilization circulation circuit 9.</p> |
